Though punctuated by the brashness of Alden Ehrenreich’s young Han Solo, the vibe of the trailer is a little chiller than was once forecast for “Solo.” The initial directors, Phil Lord and Christopher Miller (“The Lego Movie,” ”21 Jump Street”) are known for their irreverent sense of humor, something that first excited many “Star Wars” fans when the pair was enlisted for the stand-alone installment.

But Lord and Miller were removed from the film six months into production over what Lucasfilm said were “different creative visions” on the film. Ron Howard was brought in as a replacement in July, and shooting concluded in October.

The trailer for the film, to be released May 25, seemed intent on assuring fans that “Solo” will be a more typically somber chapter in the science-fiction franchise. Young Solo is shown as an ambitious flyboy who drops out of the fight academy and enlists with a rogue band led by Woody Harrelson’s Tobias Beckett.

“I’ve been running scams on the street since I was 10,” Solo says in voice-over. “I was kicked out of the fly academy for having a mind of my own. I’m going to be a pilot — best in the galaxy.”

Concerns have also been focused on Ehrenreich, who has the unenviably position of following in Harrison Ford’s footsteps in one of the most iconic roles in movies. Before booking the role, Ehrenreich starred in Joel and Ethan Coen’s “Hail, Caesar!” and Warren Beatty’s “Rules Don’t Apply,” but The Hollywood Reporter earlier reported that an acting coach was brought in late in the production to aid the actor’s performance.